40939605 has 24 divisors (see below), whose sum is σ = 81100032. Its totient is φ = 18715104.

The previous prime is 40939597. The next prime is 40939631. The reversal of 40939605 is 50693904.

40939605 is a `hidden beast` number, since 40 + 9 + 3 + 9 + 605 = 666.

It is not a de Polignac number, because 40939605 - 2³ = 40939597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40939605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64669 + ... + 65298.

It is an arithmetic number, because the mean of its divisors is an integer number (3379168).

Almost surely, 2^40939605 is an apocalyptic number.

40939605 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40939605 is a deficient number, since it is larger than the sum of its proper divisors (40160427).

40939605 is a wasteful number, since it uses less digits than its factorization.

40939605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129985 (or 129982 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 40939605 is about 6398.4064422323. The cubic root of 40939605 is about 344.6523277613.

The spelling of 40939605 in words is "forty million, nine hundred thirty-nine thousand, six hundred five".